190-00709-00 Rev. A
Garmin G1000 Pilot’s Guide for the Socata TBM 850
6-73
HAZARD AVOIDANCE
NEGATIVE CLIMB RATE AFTER TAKEOFF ALERT (NCR)
The Negative Climb Rate (NCR) After Takeoff alert (also referred to as “Altitude Loss After Takeoff”) provides
alerts when the system determines the aircraft is losing altitude (closing upon terrain) after takeoff. The aural
message “Don’t Sink” is given for NCR alerts, accompanied by an annunciation and a pop-up terrain alert on
the display. NCR alerting is only active when departing from an airport and when the following conditions
are met:
• Height above the terrain is less than 700 feet
• Distance from the departure airport is 2 nm or less
• Heading change from the departure heading is less than 110 degrees
The figure below shows the NCR alerting parameters as defined by TSO-C151b.
1000
800
600
400
200
Height Above Terrain (Feet
)
Altitude Loss (Feet)
0
20
40
60
80
100
120
140
“DON’T SINK”
“DON’T SINK”
1000
900
800
700
600
500
400
300
200
100
Height Above Terrain (Feet
)
Sink Rate (Feet Per Minute)
0
“DON’T SINK”
“DON’T SINK”
500
1000
1500
2500
3500
2000
3000
4000
Figure 6-82 Negative Climb Rate (NCR) Alert Criteria
